Reference

The charge indicator blinks.

    The charge indicator blinks slowly (every 3 seconds) when the remaining battery level is 15% or less. Plug in your tablet device and charge the battery [Details].
  • The charge indicator does not blink while your tablet device is turned off, even if the remaining battery level is 15% or less.

    When the charge indicator blinks fast (every 0.5 seconds), your tablet device may be in need of repair. Stop using the tablet device and contact the service/support center named in the warranty.